Humidifier



FIG. 1 is a front view of a humidifier showing our new design;

FIG. 2 is a top view of the humidifier of FIG. 1;

FIG. 3 is a right side view of the humidifier of FIG. 1;

FIG. 4 is a left side view of the humidifier of FIG. 1; and,

FIG. 5 is a back view of the humidifier of FIG. 1.

The broken line showing of environmental structure in FIGS. 1-4 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a humidifier, as shown and described.